Carburetor



Sept. 29, 1925.

A. H. SPENCER ET AL cARBu'Rs'ron Filed. 1 921 2 Sheets-Sheet 2 mm i u m" P n A .6 i ..B

WITNESSES Patented Sept. 29, 1925.

UNITED ,STATES PATENT OFFICE.

ALBERT H. SPENCER AND ELMER FRED SPENCER, 0F AURORA, NEBRASKA.

cnnnunnron.

Application filed August 17, 1921. Serial No. 493,024.

To all whom it mag concern:

Be it known that we, ALBERT H. SPENCER and ELMER FRED SPENCER, citizens of the United States, and residents of Aurora, in the county of Hamilton and State of Nebraska, have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to'carburetors especially adapted for use on internal combustion engines. I u 1 a An important object of this invention is to provide a carburetor having novel means whereby the air and the liquid fuel are brought together without the employment of floats or other parts likely to get out of working order. p p

A further obj ect is to providea carburetor wherein the same is provided with accurate means for regulating the flow of air past the fuel nozzle at all speeds of the motor.

A furtherobject is to provide a carburetor which is of highlysimplified construction, economical to operate and cheap to manufacture.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawing:

Figure 1 is a vertical sectional view through the improved carburetor.

Figure 2 is a horizontal sectional view through the same.

Figure 3 is a sectional View through the fuel nozzle and a heating element.

Figure 4 is a. group view of two of the sections forming a modified fuel nozzle.

Figure 5 is a side elevation of the carburetor, parts being broken away.

In the drawing, the numeral 5 designates a casing having its upper end formed with a flange 6 secured to a manifold 7 by means of bolts 8. The lower end of the casing 5 is connected with an air inlet elbow 9 through which the air is drawn for subsequent mixture with the liquid fuel.

The means for controlling the flow of air through the casing 5 include a pair of valves 10 each of which is provided with an upper longitudinally curved section 11 having its upper end horizontally hinged as indlcated at 12 to the upper end of the casing 5. A gasket 13 of copper or the like is arranged between the intake manifold 7 and the flange 6 and engages the upper terminal portion of the adjacent section 11 to assist in forming a practically airtight joint between the sec-l tion and the casingt The valves 10 are also provided withlower long tudinally curved sections 15 hinged at their upper ends as indicated at16 to the; lower termlnal portions of the sections 11;

The sections 15 of which there are twoare hinged at their lower ends as indicated at 18 to a control loop or ring 19 slidable within the casing 5 andoperated by a pair of inwardly and upwardly extending links 20. It willbe seen that when the links 20 are sections 15 will be movedinwardly and the lower terminal portions ofsthe sections 11' will also be moved inwardly for reducing the cross sectional area of the casing 5;

When the cross sectional area ofthe casing 5 is thus reduced the quantity of air passed through the -casing is likewise reduced.

The fuel-is supplied 'to thecarburetorby L 7 means of a nozzle 22'inclusive of inner. and outer sleeves 24 and 25 havin 's'paced apertures 26 adapted for registration so that the fuel contained within the inner sleeve is drawn into the casing by the vacuum. A fuel pipe 27 is connected to the inner sleeve 24 and extends from a tank 28 which may be secured to the casin 5 by means of a bracket 29., The outer s eeve 22 may be rotated by means of a crank 30, which as illustrated in Figures 2 and 3 is located exteriorly of the casing 5. Figures 2 and 3 also illustrate that the sleeve 22 is provided with a crank 130 which is connected to a ring operating lever 81 through the medium of a link 32. It will be seen that when the lever 31 is moved upwardly the control links 20 will also be elevated.

Therefore when the apertures 26 are brought into registration the valve sections 11 and 15 are moved outwardly to permit an increased quantity of air to be drawn through the casing. As illustrated in Figure 1 the lower terminal portions of the sections 11 are extended outwardly to form a pair of wings or baflies 36 which direct the air inwardly immediately over the apertures 26 whereby when the valves are nearly closed a richer mixture is provided since all of the air is directed over the apertures 26. On the other hand, when the valves are opened, the mixture is not so rich as all of the air is not brought into direct contact with the fuel.

If desired, the crank'SO may be connected with the butterfly; valve by means of a link 41 so that thebutterflyr-valve and the valves forming the control mechanism for.

the casing may be operated in unison.,.

The fuel drawn into the inner sleeve is heated by the heating coil 42 Whiohvas clearly illustrated in Figure 3 is extended into the sleeve 24 and: is con1pletelyfsur+ rounded by the fuel therein. By arranging the heating coil in the sleeve 24, the fuel is effectively heated to aidmtomization.

Asillustrated: in' Figureizr2ythe casing 5 is rectangular in: cross section andtheedges' of the valve sections-r11. and 15 are flatly engaged With the same so that' the valve sections Will not permit the passage of a large quantity of air except overthe nozzle 22.

Figure; 3 illustrates; that the inner section 24 'of the nozzle .22 isextended beyond the element.-

heating element to be conveniently i'detached at any time.

In the modified form: of the invention il-- lustrated i'iniFigureiia the outer sleeve is provided With- 'airiV- shaped longitudinal" slot 51 with a which a 'sl'ot 52 .inthe inner sleeve of order and it Will be further seen that the qualitilty of liquid fuel supplied is in accordance with the air supplied. The uniform operation-of the n1otoris provided for by the unifornr supply of fuel.

e claim A carburetor comprisingg'a casing, a noz zle traversing the casing at rightanglesto the-path-of 'travelof'the air, a'valve inclusive of pairs of upper-anddower hingedly connected sections; the-upper sections being hingedly connected tosaid-casing, a rectangular control ringslidablein said casing and having connection with the low'er sections of the v-alve,-' the lower terminal ortions ofiFthe upper valve sections being; formed with abrupt transverse outwardly directed bends adapted to be positioned-over said nozzle whereby todirect the air over said nozzle, said casing being rectangular in cross sectionand the longitudinaledges of the upperand lower valvesections being flatly engaged with 'theiw'alls of-"the casing;

ALBERT'H'; SPENCER ELMnn- FnEn-r srnNona: 

